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lavc: add a decoder option for configuring side data preference
This and the following commits fix #10857
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@ -2,6 +2,9 @@ The last version increases of all libraries were on 2024-03-07
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API changes, most recent first:
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2024-03-08 - xxxxxxxxxx - lavc 61.1.100 - avcodec.h
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Add AVCodecContext.[nb_]side_data_prefer_packet.
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2024-03-08 - xxxxxxxxxx - lavu 59.1.100 - opt.h
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Add AV_OPT_TYPE_FLAG_ARRAY and AVOptionArrayDef.
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@ -2028,6 +2028,40 @@ typedef struct AVCodecContext {
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* an error.
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*/
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int64_t frame_num;
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/**
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* Decoding only. May be set by the caller before avcodec_open2() to an
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* av_malloc()'ed array (or via AVOptions). Owned and freed by the decoder
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* afterwards.
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*
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* Side data attached to decoded frames may come from several sources:
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* 1. coded_side_data, which the decoder will for certain types translate
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* from packet-type to frame-type and attach to frames;
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* 2. side data attached to an AVPacket sent for decoding (same
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* considerations as above);
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* 3. extracted from the coded bytestream.
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* The first two cases are supplied by the caller and typically come from a
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* container.
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*
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* This array configures decoder behaviour in cases when side data of the
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* same type is present both in the coded bytestream and in the
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* user-supplied side data (items 1. and 2. above). In all cases, at most
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* one instance of each side data type will be attached to output frames. By
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* default it will be the bytestream side data. Adding an
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* AVPacketSideDataType value to this array will flip the preference for
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* this type, thus making the decoder prefer user-supplied side data over
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* bytestream. In case side data of the same type is present both in
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* coded_data and attacked to a packet, the packet instance always has
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* priority.
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*
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* The array may also contain a single -1, in which case the preference is
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* switched for all side data types.
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*/
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int *side_data_prefer_packet;
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/**
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* Number of entries in side_data_prefer_packet.
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*/
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unsigned nb_side_data_prefer_packet;
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} AVCodecContext;
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/**
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@ -65,6 +65,12 @@ typedef struct DecodeContext {
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int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
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int64_t pts_correction_last_pts; /// PTS of the last frame
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int64_t pts_correction_last_dts; /// DTS of the last frame
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/**
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* Bitmask indicating for which side data types we prefer user-supplied
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* (global or attached to packets) side data over bytestream.
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*/
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uint64_t side_data_pref_mask;
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} DecodeContext;
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static DecodeContext *decode_ctx(AVCodecInternal *avci)
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@ -1739,6 +1745,35 @@ int ff_decode_preinit(AVCodecContext *avctx)
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avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
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}
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if (avctx->nb_side_data_prefer_packet == 1 &&
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avctx->side_data_prefer_packet[0] == -1)
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dc->side_data_pref_mask = ~0ULL;
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else {
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for (unsigned i = 0; i < avctx->nb_side_data_prefer_packet; i++) {
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int val = avctx->side_data_prefer_packet[i];
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if (val < 0 || val >= AV_PKT_DATA_NB) {
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av_log(avctx, AV_LOG_ERROR, "Invalid side data type: %d\n", val);
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return AVERROR(EINVAL);
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}
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for (unsigned j = 0; j < FF_ARRAY_ELEMS(sd_global_map); j++) {
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if (sd_global_map[j].packet == val) {
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val = sd_global_map[j].frame;
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// this code will need to be changed when we have more than
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// 64 frame side data types
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if (val >= 64) {
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av_log(avctx, AV_LOG_ERROR, "Side data type too big\n");
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return AVERROR_BUG;
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}
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dc->side_data_pref_mask |= 1ULL << val;
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}
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}
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}
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}
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avci->in_pkt = av_packet_alloc();
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avci->last_pkt_props = av_packet_alloc();
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if (!avci->in_pkt || !avci->last_pkt_props)
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@ -42,6 +42,8 @@
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#define D AV_OPT_FLAG_DECODING_PARAM
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#define CC AV_OPT_FLAG_CHILD_CONSTS
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#define AR AV_OPT_TYPE_FLAG_ARRAY
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#define AV_CODEC_DEFAULT_BITRATE 200*1000
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static const AVOption avcodec_options[] = {
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@ -395,6 +397,16 @@ static const AVOption avcodec_options[] = {
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{"unsafe_output", "allow potentially unsafe hwaccel frame output that might require special care to process successfully", 0, AV_OPT_TYPE_CONST, {.i64 = AV_HWACCEL_FLAG_UNSAFE_OUTPUT }, INT_MIN, INT_MAX, V | D, .unit = "hwaccel_flags"},
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{"extra_hw_frames", "Number of extra hardware frames to allocate for the user", OFFSET(extra_hw_frames), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, V|D },
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{"discard_damaged_percentage", "Percentage of damaged samples to discard a frame", OFFSET(discard_damaged_percentage), AV_OPT_TYPE_INT, {.i64 = 95 }, 0, 100, V|D },
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{"side_data_prefer_packet", "Comma-separated list of side data types for which user-supplied (container) data is preferred over coded bytestream",
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OFFSET(side_data_prefer_packet), AV_OPT_TYPE_INT | AR, .min = -1, .max = INT_MAX, .flags = V|A|S|D, .unit = "side_data_pkt" },
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{"replaygain", .default_val.i64 = AV_PKT_DATA_REPLAYGAIN, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{"displaymatrix", .default_val.i64 = AV_PKT_DATA_DISPLAYMATRIX, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{"spherical", .default_val.i64 = AV_PKT_DATA_SPHERICAL, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{"stereo3d", .default_val.i64 = AV_PKT_DATA_STEREO3D, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{"audio_service_type", .default_val.i64 = AV_PKT_DATA_AUDIO_SERVICE_TYPE, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{"mastering_display_metadata", .default_val.i64 = AV_PKT_DATA_MASTERING_DISPLAY_METADATA, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{"content_light_level", .default_val.i64 = AV_PKT_DATA_CONTENT_LIGHT_LEVEL, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{"icc_profile", .default_val.i64 = AV_PKT_DATA_ICC_PROFILE, .type = AV_OPT_TYPE_CONST, .flags = A|D, .unit = "side_data_pkt" },
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{NULL},
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};
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@ -29,7 +29,7 @@
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#include "version_major.h"
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#define LIBAVCODEC_VERSION_MINOR 0
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#define LIBAVCODEC_VERSION_MINOR 1
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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